Sky C.
asked • 12/19/18Based on this, what is the maximal margin of error associated with a 99% confidence interval for the true population mean backpack weight.
± ____________ ounces
Raymond B. answered • 10/03/20
the empircal rule is 68-95-99
actually it's 68-95-99.5 but use 99 as it's more simple here
99% of the data falls within 3 standard deviations from the mean
3x4 = 12
43 plus or minus 12 is the 99% confidence interval. (31,55)
It's really a 99.7 confidence interval, but to narrow it a little you'd need z tables or a calculator
Raymond B. answered • 10/03/20
the empircal rule is 68-95-99
actually it's 68-95-99.5 but use 99 as it's more simple here
99% of the data falls within 3 standard deviations from the mean
3x4 = 12
43 plus or minus 12 is the 99% confidence interval. (31,55)
It's really a 99.7 confidence interval, but to narrow it a little you'd need z tables or a calculator
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